Financial Instruments (Details 4) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
Derivative assets
Gross Amount Recognized	$ 769	$ 819
Net Amount Presented	769	819
Gross Amounts Not Offset
Derivatives	214	153
Financial Collateral	465	631
Net Amount	90	35
Derivative liabilities
Gross Amount Recognized	228	192
Net Amount Presented	228	192
Gross Amounts Not Offset
Derivatives	214	153
Financial Collateral	10	19
Net Amount	$ 4	$ 20
Period within which the funds held as collateral and posted as collateral are transferred from or to counterparties	2 days